/***************************************************************************
*                                GumpEntry.cs
*                            -------------------
*   begin                : May 1, 2002
*   copyright            : (C) The RunUO Software Team
*   email                : info@runuo.com
*
*   $Id: GumpEntry.cs 644 2010-12-23 09:18:45Z asayre $
*
***************************************************************************/

/***************************************************************************
*
*   This program is free software; you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation; either version 2 of the License, or
*   (at your option) any later version.
*
***************************************************************************/

using System;
using Server.Network;

namespace Server.Gumps
{
    public abstract class GumpEntry
    {
        private Gump m_Parent;

        protected GumpEntry()
        {
        }

        protected void Delta(ref int var, int val)
        {
            if (var != val)
            {
                var = val;

                if (this.m_Parent != null)
                {
                    this.m_Parent.Invalidate();
                }
            }
        }

        protected void Delta(ref bool var, bool val)
        {
            if (var != val)
            {
                var = val;

                if (this.m_Parent != null)
                {
                    this.m_Parent.Invalidate();
                }
            }
        }

        protected void Delta(ref string var, string val)
        {
            if (var != val)
            {
                var = val;

                if (this.m_Parent != null)
                {
                    this.m_Parent.Invalidate();
                }
            }
        }

        public Gump Parent
        {
            get
            {
                return this.m_Parent;
            }
            set
            {
                if (this.m_Parent != value)
                {
                    if (this.m_Parent != null)
                    {
                        this.m_Parent.Remove(this);
                    }

                    this.m_Parent = value;

                    this.m_Parent.Add(this);
                }
            }
        }

        public abstract string Compile();

        public abstract void AppendTo(IGumpWriter disp);
    }
}